The genus Cladosporium and similar dematiaceous ... - CBS - KNAW

Crous et al.
Fig. 22. Fusicladium fagi (CBS 621.84). A. Conidiophore with truncate conidiogenous loci. B. Hypha with conidiogenous loci. C–G. Conidial chains. Scale bars = 10 µm.
Fusicladium caruanianum Sacc., Ann. Mycol. 11: 20. 1913.
≡ Pseudocladosporium caruanianum (Sacc.) U. Braun, Schlechtendalia
9: 114. 2003.
Fusicladium convolvularum Ondřej, Česká Mycol. 25: 171. 1971.
Fig. 21.
In vivo: Schubert et al. (2003: 37).
In vitro on SNA: Mycelium unbranched or only sparingly branched,
2–3 µm wide, septate, not constricted at septa, subhyaline to pale
brown, smooth, walls unthickened or almost so. Conidiophores
laterally arising from hyphae, erect, straight to somewhat flexuous,
sometimes geniculate, unbranched, (6–)12–75 × (2.5–)3–4.5
µm, aseptate or septate, pale brown or pale medium brown,
smooth, walls somewhat thickened, sometimes only as short
lateral conical prolongations of hyphae, occasionally irregular in
shape. Conidiogenous cells integrated, terminal or conidiophores
reduced to conidiogenous cells, sometimes geniculate, 6–29 µm
long, proliferation sympodial, with several denticle-like loci, broadly
truncate, 1.5–2(–2.5) µm wide, unthickened, somewhat refractive
or darkened. Ramoconidia occurring, 20–28 × 5 µm, 0–1-septate,
somewhat darker, pale medium brown, with a broadly truncate
base, 3–4 µm wide, usually with several denticle-like apical loci.
Conidia catenate, formed in unbranched or loosely branched
chains, straight to sometimes curved, cells sometimes irregularly
swollen, fusiform, subcylindrical, sometimes obpyriform, 13–35 ×
3.5–5.5(–6) µm, 0–3-septate, occasionally slightly constricted at
the median septum, few very large conidia with up to five septa,
up to 75 µm long, 4.5–6 µm wide, subhyaline to pale brown,
smooth, walls slightly thickened, slightly attenuated towards apex
and base, hila broadly truncate, 1–2 µm wide, unthickened or
only slightly thickened, somewhat darkened-refractive; microcyclic
conidiogenesis occurring, conidia often germinating.
Cultural characteristics: Colonies on PDA spreading, somewhat
erumpent, with moderate aerial mycelium and regular, but feathery
margins; surface fuscous black, and reverse dark fuscous black.
Colonies reaching 15 mm diam after 1 mo on PDA at 25 °C in the
dark.
Specimens examined: Czech Republic, Libina, okraj pole pod nadrazim (okr.
Sumperk), on Convolvulus arvensis (Convolvulaceae), 7 Sep. 1970, Ondřej,
holotype BRA. New Zealand, on leaves of Convolvulus arvensis, 7 Nov. 2000,
C.F. Hill, epitype designated here CBS H-19911, culture ex-epitype CBS 112706
= CPC 3884 = IMI 383037.
Note: Conidiophores are somewhat longer and narrower in vitro
than in vivo, and ramoconidia occur (Schubert & Braun 2002b,
Schubert et al. 2003).
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